Photochemical smog does not contain
1. PAN
2. Ozone
3. Nitrogen dioxide
4. CO2

Subtopic:  Air Pollution |
 57%
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In which one of the following the BOD (Biochemical oxygen demand) of sewage (s), distellary effluent(DE), paper mill effluent (PE) and sugarmill effluent (SE) have been arranged in ascending order.
1. SE < PE < S < DE
2. PE < S < SE < DE
3. S < DE < PE < SE
4. SE < S < PE < DE

Subtopic:  Water Pollution |
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In coal fired power plants, electrostatic precipitators are fitted to control emission of:
1. NOx
2. CO
3. SPM
4. SO2

Subtopic:  Air Pollution |
 55%
From NCERT
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Which is correct
1. Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants
2. Cyanobacteria, Anabaena and Nostoc are mobilizers of phosphates and plant nutrition in soil
3. At present it is not possible to grow maize without chemical fertilizers
4. excessive use of chemical fertilizers may lead to eutrophication of nearby water bodies

Subtopic:  Water Pollution |
 71%
From NCERT
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Which is not a bio indicator of water pollution
1. Blood worms
2. Stone flies
3. Sewage fungus
4. Sludge worms.

Subtopic:  Water Pollution |
 51%
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Which one of the following is correct percentage of the two (out of the total of 4) green house gases tocontribute to the total global warming.
1. N2O 6%, CO2 86 %
2. Methane 20% , N2O 18%
3. CO2 40%, CFC 30%
4. CFCs 14%, methane 20%

Subtopic:  Green House Effect & Global Warming |
 78%
From NCERT
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According to Central Pollution Control Board (CPCB), Which particulate size in diameter (in
micrometres) of the air pollutants is responsible for greatest harm to human health
1. 1•0 or less
2. 5•2-2•5
3. 2•5 or less
4. 1•5 or less

Subtopic:  Air Pollution |
 87%
From NCERT
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Montreal Protocol aims at
1. Control of CO2 emission
2. Reduction of ozone depleting substances
3. Biodiversity conservation
4. Control of water pollution

Subtopic:  Ozone Layer Depletion |
 92%
From NCERT
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Chipko movement was launched for the protection of
1. Wet Lands
2. Grasslands
3. Forests
4. Livestock

Subtopic:  Green House Effect & Global Warming |
 94%
From NCERT
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The two gases making the highest relative contribution to the greenhouse gases are:
1. CH4 and N2O
2. CFCs and N2O
3. CO2 and N2O 
4. CO2 and CH4

Subtopic:  Green House Effect & Global Warming |
 84%
From NCERT
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